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A combinatorial approach to synthesis of the La0.8Sr0.2Co1-yMnyO3 (+/-) (delta) family of perovskite-type mixed conducting metal oxides and characterisation of the surface, oxygen mobility

Lookup NU author(s): Dr Alan Thursfield, Professor Ian Metcalfe

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Abstract

The mixed conducting perovskite-type La0.8Sr0.2Co1-yMnyO3 +/- delta family has been synthesised by a combinatorial method. This system including the two end member materials (y = 0 and 1) have been studied using temperature programmed methods in order to relate structure and composition to oxygen exchange under a hydrogen atmosphere. Oxygen is removed in two steps: firstly, labile surface oxygen from 350 to 450 degrees C and then more strongly bound lattice oxygen. A relationship between the B-site manganese and cobalt content and ease of removal of lattice oxygen was demonstrated over the temperature range of 600-820 degrees C. Removal of labile surface oxygen was independent of the B-site composition but associated with A-site cations on the external surface of the crystallites. (c) 2012 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Thursfield A, Rossiny JCH, Fearn S, Kilner JA, Metcalfe IS

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 18th International Conference on Solid State Ionics (SSI)

Year of Conference: 2012

Pages: 182-185

Date deposited: 28/03/2013

ISSN: 0167-2738

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.ssi.2012.04.013

DOI: 10.1016/j.ssi.2012.04.013

Library holdings: Search Newcastle University Library for this item

Series Title: Solid State Ionics

ISBN: 18727689


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